Attachment for electric razors



Sept. 21, 1943. .1. E. GANTNER 2,329,891

ATTACHMENT FOR ELECTRIC RAZORS Filed July 10, 1942 2 Sheets-Sheet l 5 5i 22 1' 2'5 17 2O 3o 26 ii A ,3;

Sept. 21, 1943. J, E. GANTNER ATTACHMENT FOR ELECTRIC RAZORS 2 sheetssheet 2 Filed July 10, 1942 .Patented Sept. 21, 1943 H it.

6 Claims.

My invention relates to a rocking motion for electric razor and Ideclare the following to be a full, clear, concise and exact descriptionthere of sufficient to enable anyone skilled in the art to which itappertains to make and use the same,.

reference being had to the accompanying drawings in which like referencecharacters refer to like parts throughout the specification.

The object of the invention is to provide a device for rocking anelectric razor when in use, whereby to aid in increasing itseffectiveness in severing the beard from a persons face. Heretofore, inthe use of an electric razor, it has been necessary to rock the razorwith the hand in order to get a clean shave. The present invention isdesigned to simulate the movements of the hand to accomplish the desiredresults. To this end an outer casing having bearing members to beattached to the ordinary electric razor is used. There are means withinthe outer casing for rocking the electric razor casing, an electricmotor for actuating said means. The device can be applied to theordinary electric razor.

The object will be understood by referring to the drawings in which:

Fig, 1 is a perspective view of the device.

Fig. 2 is an elevational view showing the central vertical section ofthe attachment.

Fig. 3 shows a detail view of an end view of an electric razor brokenaway and parts of actuation mechanism applied thereto.

Fig. 4 shows a central vertical section of a modified form of theattachment.

Fig. 5 is a detail enlarged view of a cam and strap employed.

Fig. 6 shows a modified form of the electric razor, with the attachmentapplied thereto.

Fig. 7 shows a central vertical section of Fig. 5, parts being in full.

Fig. 8 shows a detailed enlarged view showing a perspective of amodified form of the device, parts being broken away.

Fig. 9 is a diagrammatic view of the wiring.

Referring more particularly to the drawings, the device embodies a.casing l within which is suported on trunnions 2, 2 any ordinaryelectric razor 3 similar to the Schick or Remington type. Casing I isopen at its front and rear ends. It encloses the larger portion of therazor 3 leaving the front part 4 containing the shearing mechanismexposed for use in shaving the beard of a person. Furthermore, casing Iis spaced from the outer casing 5 of razor 3, whereby to allow for alimited amount of rocking motion of electric razor 3. Trunnions 2, 2 arefastened to opposite lateral walls e, 5 of easing i being projectedthrough suitable apertures therein and anchored in bosses l8, 10 thatare welded'or otherwise secured to the inner opposite surfaces of walls5, 5.

Furthermore, trunnions 2, 2 project inward and rest in loose bearings H,if made in the casing 5 of razor 3. Bearings ll may be made any suitabledistance from the ends of razor 3, whereby to allow for a predeterminedamount of rocking thereof.

A shelf I5 is made integral with the lower part it of easing 5. Itprojects rearwardly from said casing 5 and is engaged by a disk 11eecentrically mounted on power shaft 20 of electric motor 2| which issupported by the base i of easing 5.

Disk I! turns with shaft 20, whereby to cause electric razor 3 to rockon its trunnions 2, 2. Said disk i7 engages shelf l5 for this purpose.The means for rocking razor 3 in the opposite direction to return razor3 to its normal position contemplates a coiled spring 22 that isfastened at one end to an outer corner 23 of shelf 15 and at itsopposite end to the underside of the top of easing l.

Wires 25, 25 are in electric circuit with the motor, not shown thatactuates the shearing knives 26 and 21 are connected to motor 2!,whereby to energize said motor 2|.

The terminals for the electric circuit that energizes the motor notshown which actuates the shearing knives 26 and 21 and the motor 2| areshown at 30, 30.

In operation, the user will connect the plug switch to the housecircuit, now shown, with terminals 30, 30 which will actuate shearingknives 26 and 2'! and also eccentrically mounted disk II. He then graspscasing I and using it as a handle will move razor 3 over the parts ofhis face to effect a clean shave. As the razor 3 is moved over his facethe razor 3 will rock on its pivots or trunnions 2, 2 to effect themotion heretofore made by his hand alone. At the same time the shearingknives 25 and 21 will sever his heard.

The modification shown in Fig. 4 embodies strap rings 35, 35 fastened tothe bottom surface of electric razor 3 in which turns cams 3B, 36mounted eccentrically on shaft 31, which is supported in a bearing injournal block 38 secured to the outer casing 40 and also in a bearing insupport 4| secured to casing 40, A pinion 42 is fixed to revolve withshaft 31 and is in mesh with spur gear 43 mounted to turn with powershaft 44 of electric motor 45. Motor 45 is supported on member 4|. Theratio of gear 43 to the pinion 42 will cause shaft 31 to revolve muchfaster than shaft 44.

Laterally extending pins 58, 50 extend from opposite sides of electricrazor 3. Pins 50, 50 engage guide slots 5| made in the inner side wallsof casing 40.

The front end of casing 40 is open as in the former structure, wherebyto expose the front end 52 of the electric razor 3.

The electric terminals 55, 55 of the motor not shown of razor 3 areconnected in electric circuit with the terminals of motor 45, whereby tocause both motors to operate simultaneously.

In operation, the user will plug in terminals 55, 55 with the housecircuit, whereby to actuate the knives of the razor and to cause therotation of power shaft 44 and through gear 43 and pinion 42, and shaft31 whereby cams 36, 38 will move razor 3 up and down to simulate thesaid motion usually applied by the user of the razor 3. Casing 48 willbe used as a handle for moving the blades over the face.

The modification shown in Figs. 6 and '7 embodies an electric razorhaving cylinder shearing knives 6D and GI. Shearing knife 68 is in theform of a cylinder, as above indicated. It has a relatively thick endwall 61 and is mounted to turn with power shaft 85. To this end a setscrew 63 is projected through the reduced rearwardly extended part 64 toengage shaft 65. The opposite end of cylinder knife 60 is open. Itslateral outer surface is formed with teeth 66 made by cutting alternateslots 68 through said surface. Solid parts 69 are left at diametricallyopposite locations.

The co-operating cylinder knife BI is fitted to slide axially withinknife 68. Its outer surface is in contact with the inner surface ofknife 68. Teeth are made in the outer surface of knife 6| by cuttingalternate slots through its surface,

whereby the axially movement of knife 6| rela-' tive to the stationaryknife 60 will effect a shearing action to cut the beard of the personusing the same. An annular slot 12 is made in the body of knife 6| toaid in the formation of teeth 10. Solid parts are left between teeth 18at diametrically opposite locations similar to parts 69 of knife 60.

The means for moving cylinder knife 6| reciprocally and axially relativeknife 68 contemplates a pin projected through. the reduced rearwardlyextended sleeve part of knife 6i. Said pin 15 projects into an endlessspiral guide groove 11 made in power shaft 65, whereby the turning ofshaft 65 will cause pin 15 to travel in said spiral groove 11 andthereby reciprocate cylindrical knife 6| relative to knife 68, to causethe teeth 10 of said cylinder iii to effect a shearing action withco-operating teeth 66 or cylinder 68 to cut the person's beard.

Knife BI is splined to shaft 65by providing a key 80 that fits into anopen elongated co-operating aligned recess 8| made in shaft 62 ad acentits end and in the body 83 of cylinder knife 6|. Said recesses 81 are nolonger than key 55, whereby to permit of the axial movement of knife 6|relative knife 60 as above mentioned.

Shaft 62 extends to the rear and is enclosed by a hollow cylindricalcasing 84 that supports said shaft in bearing 85 at the front endthereof.

Shaft 65 projects through the center of an electric motor 86, havingplug in electric terminals 81, 81 that extend into the indenture or openrecess 88 formed in the rear end of casing 84.

Motor 86 maybe fastened to the inner surface of cylindrical casing 84 at89, 89.

In operation, the user will plug in on terminals 81, 81 to some housecircuit and then by taking hold of cylinder casing 84 and using it as ahandle move the shearing blades 60 and GI over his face to effect aclean shave. As said blades 60 and BI move over the face, both bladeswill revolve with shaft 65 because of the splined connection of cylinder6| with shaft 65 and of the set screw connection of cylinder 60 at 63.Furthermore, blade 6| will be reciprocated axially with respect to blade60 which is stationary in an axial manner because of the pin 15travelling in spiral guide groove 11 in shaft 65, whereby to cause theteeth 10 of cylinder blade BI to cooperate with the teeth 66 ofcylindrical blade 60.

In place of spring 22 shown in Figs. 2 and 3 a metal strap such as 35shown in Fig. 5 could be used to rock the electric razor 3 on its pivotsH, H.

The modification is shown in Fig. 8 where the strap 35 is welded orotherwise secured to shelf l5.

Fig. 9 shows a diagrammatic plan of the wiring of the two electricmotors, that is motor 90 for actuating the shearing knives 26 and 21 andthe other 2| for rocking electric razor 3. Motor 2| for controlling theactuation of knives 2B and 21 has one terminal 38 connected to wire 25leading to wire 91 of the 110 volt house circuit and its oppositeterminal 38 to the other wire 25 leading to the opposite wire I00 of the110 volt house circuit.

Likewise, motor 90 controlling the rocking motion, has one terminal I02connected to said wire 25 leading to the wire 91 and the oppositeterminal I93 connecting to the other wire 25 leading to said wire I00.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is as follows:

1. In an attachment for electric razors, a casing for enclosing a razor,pivotal means in said casing for mounting said razor, a shaft mountedfor rotation in said casing, a disk eccentrically mounted on said shaftand engaging said razor for rocking said razor in one direction andmeans for rocking said razor in the opposite direction.

2. In an attachment for electric razors, a casing having means forpivotally mounting said razor, a shaft mounted for rotation, and aneccentrically mounted disk on said shaft and engaging said razor to aidin rocking the same, whereby to aid in shaving.

3. In an attachment for electric razors, a casing enclosing said razor,pivots for mounting said razor to said casing, a shelf formed on saidrazor at some distance from the line joining said pivots, a diskengaging said shelf and mounted eccentrically to a shaft carried in saidcasing, an electric motor mounted in said casing for rotating saidshaft, whereby to rotate said disk to effect a rocking of said razor toaid in shaving, and a spring connected to said razor and to said casingto urge said shelf against said disk.

4. In an attachment for electric razors, a casing enclosing a razor,pivots supported by said casing for mounting said razor to said casing,a shelf formed on said razor at a distance from the line through saidpivots, a shaft mounted in hearings in said casing, an eccentricallymounted disk on said shaft engaging said shelf, whereby to rock saidrazor in one direction and spring means attached to said razor forrocking said razor in the opposite direction.

5. In an-attachment for electric razors, a casing, means for pivotallymounting said razor, a circular strap secured to said razor, a shaftmounted to rotate in said casing, a disk eccentrically mounted on saidshaft and engaging said strap. whereby to rock said razor.

